Sgoldstino Interpretation Of HyperCP Events

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µ arXiv:0911.4516v1 [hep-ex] 23 Nov 2009

1.2. Response to the HyperCP Result The HyperCP result produced a flurry of ex-citement. One early suggestion [4] was that they had observed an sgoldstino; this interpretation sug-gests that Br(X0→γγ) might be much greater than Br(X0→γγ); in response, the E391 collaboration looked for [5] (and did not find) K0 L→ ππX 0,X0 →

New Experiments with Antiprotons

the current level of statistics this interpretation is of course not definitive: the probability that the 3 signal events are consistent with the form-factor decay spectrum of Fig. 6a is estimated at 0.8%. The measured branching ratio is [3.1 ± 2.4 (stat) ± 1.5 (syst)] × 10−8 assuming the intermediate Σ+ → pX0 two-body decay, or [8.6+6.6

N. ARNAUD, representing the B Laboratoire de L Acc´el´erateur

Events x ( 0.027 GeV / Bin Size ) 0 5 10 Figure 1: Left plot: signal-enhanced distribution of the selected data in the m φ2 vs. m φ1 plane. 5 zones have been

Evidence for the Sgoldstino - Fermilab

HyperCP Event Yields ¥ In 12 months of data taking in 1997Ð99, HyperCP recorded one the largest data samples ever by a particle-physics experiment: 231 billion events, 29,401 tapes, and 119.5 TB of data Largest hyperon samples ever taken! includ e ~ 1 0 10! # decays # ! !$ % K ! % % % & ! !$ K R e c o n s t r u c t e d E v e n t s Mode

P986: Medium-Energy Antiproton Experiments

the current level of statistics this interpretation is of course not definitive: the probability that the 3 signal events are consistent with the form-factor decay spectrum of Fig. 6a is estimated at 0.8%. The measured branching ratio is [3.1 ± 2.4 (stat) ± 1.5 (syst)] × 10−8 assuming the intermediate Σ+ → pX0 two-body decay, or [8.6+6.6

arXiv:hep-ph/0610066 v1 5 Oct 2006

We further discuss possible sgoldstino interpretation of the obser-vation, reported by the HyperCP collaboration, of three Σ+ → pµ+µ− decay events with dimuon invariant mass 214.3 MeV within detector resolution. With sgoldstino mass equal to 214.3 MeV, this interpreta-tion can be verified at existing and future B- and φ-factories. We find

arXiv:hep-ph/0509147v2 13 Feb 2006

We discuss possible sgoldstino interpretation of the observation, reported by HyperCP collaboration, of three Σ+ → pµ+µ− decay events with dimuon invariant mass 214.3 MeV within detector resolu-tion. We find that this interpretation is consistent in models with (i) parity conservation in sgoldstino interactions, (ii) pseudoscalar sgold-

Search for a Light Pseudoscalar Particle in the Decay KL X

This study was motivated by the three events of the decay 214:3 MeV=c2 reported by the HyperCP collaboration in 2005 [1]. A sgoldstino interpretation [2,3] for

P986: Intensity-Frontier Antiproton Physics with The

the current level of statistics this interpretation is of course not definitive: the probability that the 3 signal events are consistent with the form-factor decay spectrum of Fig. 6a is estimated at 0.8%. The measured branching ratio is [3.1 ± 2.4 (stat) ± 1.5 (syst)] × 10−8 assuming the intermediate Σ+ → pX0 two-body decay, or [8.6+6.6

PoS(KAON09)040 - citeseerx.ist.psu.edu

HyperCP reported this may indicate the decay proceeded via an intermediate state, Σ + → pX, X → µ + µ − , with a X mass of 214.3±0.5 MeV/c 2 Nearly a year later, one [3, 4] suggested a sgoldstino interpretation for the HyperCP obser-

KEK

國立臺灣大學理學院物理學研究所 博士論文 Graduate Institute of Physics College of Science National Taiwan University Doctoral Thesis 中性K 介子

Search for

With mX = 214.3 MeV as hinted by a previous HyperCP experiment, we report the rst search of the decay KL! ˇ0X using the Run2 data sam-ple recorded with the E391a detector at KEK-PS. The particle X has a theoretical interpretation as the pseudoscalar sgoldstino. It is predicted to decay predominantly to two photons. As a result of this search, we

New Experiments with Muon Cooling and Future Muon Facilities

Apr 12, 2010 recent HyperCP results is the observation of the rarest hyperon decay ever, Σ+ → pµ+µ− [5]. As shown in Figs. 5 and 6, based on the 3 observed events, the decay is consistent with being two-body, i.e., Σ + → pX 0 , X 0 → µ + µ − , with X 0 mass m

Future CPT Tests at Fermilab Muon Cooling and Future Muon

the current level of statistics this interpretation is of course not definitive: the probability that the 3 signal events are consistent with the form-factor decay spectrum of Fig. 6a is estimated at 0.8%. The measured branching ratio is [3.1 ± 2.4 (stat) ± 1.5 (syst)] × 10−8 assuming the intermediate Σ+ → pX0 two-body decay, or [8.6+6.6